KR890003102B1 - Rotary flywheel skid sensing means for vehicle hydranlic braking system - Google Patents

Abstract

Rotary fleywheel skid sensing means for a vehicle hydraulic braking system comprises a flywheel mechanism (5) rotatable with a shaft (4) adapted to be driven from a wheel to be braked and includes a flywheel member (10) and a thrust member (13) together with camming means (15,16,17) responsive to relative angular movement between the two members (10,13) to cause one of the said members to move axially relative to the other between a first angular position in which the two members are in a predetermined angular alignment and a second angular position.

Description

Rotary flywheel skid detection device for vehicle hydraulic brake

1 is a front view showing the rotary flywheel skid detection device by removing the cover.

2 is a cross-sectional view taken along line 2-2 of FIG.

FIG. 3 is a front view similar to FIG. 1 but omitting the housing and showing other fastening means. FIG.

4 is an explanatory diagram showing the relationship of the force with respect to the weight shown in FIG.

* Explanation of symbols for main parts of the drawings

3: pressure relief valve and modulator assembly 4: vertical axis

5: skid detection means 10: flywheel

13: annular thrust member 15: ball

16, 17: request 30: weight

31: radial air 33: compression spring

34: cast request 40: weight

41: rotation axis 42: lever

43: mass 44: inward projection

45: slot 46: tension spring

48: fixed body 49: string

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary flywheel skid detection device for a hydraulic braking device of a vehicle, in particular comprising a flywheel mechanism that rotates with an axis driven from a wheel to be braked and includes a flywheel member and a thrust member and a relative angle between these two members. Means for activating the brake pressure modulating means, wherein one of these members moves axially with respect to the other side in response to the movement such that the first angular position and the axially movable brake parts of these two members are aligned at a predetermined angle. The present invention relates to a rotary flywheel skid detecting device for a hydraulic braking device of a vehicle including a cam means moved between the second angles cooperating with each other.

In the skid detection device of the type mentioned above, for example, when the vehicle suddenly brakes at a low speed on a busy road, the brake may be released early before responding to the true skid signal. This phenomenon, of course, depends on the sensitivity of the skid detection system, but it is important to prevent the skid detection system from operating until the vehicle runs at a predetermined minimum speed to avoid collision with the vehicle following the sudden stop of the vehicle. I hope.

Particularly, in British Patent No. 1241798 for a skid detection device of a large vehicle type, it can be seen that a restraining means is configured to prevent the skid detection device from operating when the vehicle is traveling at a low speed.

In this British Patent No. 1241798, the skid detection device is composed of a first speed sensitive governor which rotates simultaneously with a wheel-driven rotating member, which limits the rotational speed of the rotating member from which the speed control function of the first speed sensitive governor is not extracted. The brake member can be released by moving the control member in the axial direction with respect to the rotating member when the speed is equal to or lower than the rotation member.

The restraining means has a limit speed greater than that of the first governor and prevents the control member from moving in the axial direction with respect to the rotating member when the vehicle is not operated at a low vehicle speed so that the brake is not released because the first governor does not operate. And a second speed sensitive governor coupled with the member.

Each governor is composed of a series of weights disposed on the periphery of the rotating member, and each weight has an outer end of the arm rotatably installed for angular movement about an axis lying in a plane perpendicular to the axis of the rotating member. It is fixed.

In addition, U.S. Patent No. 3415343 describes a double acting cache device for a lift mechanism, in which two centrifugal bodies move radially outward in a predetermined number of revolutions of the regulator shaft. It is engaged with the protrusion formed in the drum brake.

In the skid sensing device of the above-mentioned type according to an aspect of the present invention, a fixing means operated by centrifugal force is provided to fix the two members together at the first angular position with respect to the opposite side, which fixing means is provided in advance of the vehicle. It is automatically releasable in response to a centrifugal force of a magnitude corresponding to the determined minimum running speed, and the fastening means consists of at least one weight movable in a plane perpendicular to the axis of the axis, which weight is usually two members. It is held inward by the elastic means to the fixed position to hold together, and when the centrifugal force applied to this weight reaches a size equal to or greater than the minimum driving speed, it moves outward to reach the separation position, The two members are free to move relative to the other side, and the weight is compensating for one side It is composed of a plunger whose inner end is elastically coupled to a request formed in the shape of a bow. When the fastening means consists of a plunger, it is preferably composed of two plungers, which are arranged radially opposite to the opposite side.

According to the second aspect of the present invention, the skid detection device of the above-mentioned type is provided such that a fixing means operated by centrifugal force fixes the two members together at the first angular position with respect to the opposite side, and the fixing means is provided in advance of the vehicle. In which it is automatically releasable in response to a centrifugal force of a magnitude corresponding to the determined microtravel speed, the fastening means comprising at least one weight movable in a plane perpendicular to the axis of the axis, the weight being normally It is held inward by the elastic biasing means in a fixed position for fixing the two members together, and the weight moves to the separation position when the centrifugal force applied thereto reaches a size equal to or greater than the minimum traveling speed. Afterwards, these two members are free to move relative to the other side, and the weight is about the axis of the axis. It is installed rotatably on a pivot of one side member so as to be rotated about a parallel axis, and a spring is mounted on the pivot so that a part of the weight is coupled to the request, which is a compensating form of the other side. do.

The request may be in the form of a continuous request extending in the circumferential direction. By combining the weight with this requirement, the relative axial movement between the two members is prevented. In addition, the demand is configured in the form of a slot in the axial direction so that the weight body is coupled to it can prevent the state angular movement between the two members.

In one configuration, the flywheel member is attached to the shaft so that the rotation is fixed in the axial direction, the thrust member is inserted into at least a portion of the annular demand formed on one side end of the flywheel in the form of an axially movable one. In this configuration, the fixing means is mounted on the flywheel member and a cutout is formed on an adjacent outer surface of the output member.

The two embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The sensing means shown in FIGS. 1 and 2 consist of a housing 1 in which a hydraulic pump 2 and a pressure relief valve-modulator assembly 3 are combined. The longitudinal axis 4 protruding on both sides of the housing 1 has a radially cylindrical rim portion of the housing 1 in which wheels to be braked are engaged at one end and closed at the other end with a detachable cover 7. 6) A skid detection device in the form of a flywheel assembly 5 enclosed within is installed. The rim portion 6 protects the other mechanism portion from the radially protruding foreign matter.

The flywheel assembly 5 is connected to one end of the shaft 4 at the end of the flywheel 10 which is rotatable by the two bearings 11 and 12 and towards the outer end of the rim 6. It is composed of an annular thrust member 13 at least partially inserted into the formed annular demand 14. There is a gap between the outer edge of the thrust member 13 and the outer wall of the request 14 and between the inner edge of the thrust member 13 and the inner wall of the request 14.

Three balls 15 are arranged to maintain the same spacing in the requests 16 and 17 formed in mutually complimentary form on the opposite adjacent surfaces of the flywheel 10 and the thrust member 13.

The thrust member 13 is attached to the end of the shaft 4 by the mounting means 18. The mounting means is fixed to the end of the shaft (4) and the radially driven flange (19) in which a pair of protruding pieces (20) extending in the axial direction toward the outer end of the rim portion (6) on the peripheral edge thereof is opposed in the radial direction. ), And a plate-shaped clutch plate 21 having a pair of cutouts 23 into which the protruding pieces 4 are inserted and frictionally engaged with the radial clutch surface 22 of the thrust member 13 at the outer peripheral edge portion. do. The plate-shaped clutch plate 21 is spaced at regular intervals from the end of the shaft 4.

The thrust member 13 is supported toward the flywheel 10 side by the force of a spring (not shown), and this force is transmitted through each of the moving levers 24 mounted on the clutch plate 21 and the housing 1. It is transmitted to the thrust member (13). The force biased by acting on the clutch plate 21 at the alignment axially aligned with the rotational axis of the shaft 4 through the adjustable thrust transfer member 25 spirally coupled through the lever 24 is provided. Is delivered intensively).

The thrust member 13 can be moved in the radial direction with respect to the flywheel 10 so that the force of the spring is divided evenly between the three balls 15.

A pair of radially opposed weights 30 in the form of a plunger are disposed in the radial hole 31 formed in the outer wall 39 of the flywheel 10 forming the outer wall of the annular demand 14. The radial ball 31 lies on a plane perpendicular to the axis of the axis 4.

Each plunger 30 is inside of a small diameter carried by a compression spring 33 inserted into each radial ball 31 so as to engage with a peripherally extending request 34 formed on an adjacent outer surface of the thrust member 13. Has an end 32.

Thus, the plunger 30 is normally inwardly imparted with the spring 33 and coupled to the request 34. Thus, the flywheel 10 and the thrust member 13 hold them against relative axial movements, and because the balls 15 are inserted into the requests 16 and 17, they hold them against relative angular movements.

The weight of the plunger 30 is such that the centrifugal force generated at a predetermined minimum running speed of the vehicle, as mentioned above, is sufficient to direct the plunger 30 radially outward so that the plunger 30 deviates from the demand 34. 10 and the thrust member 13 are selected not to be fixed. Indeed the weight of the plunger 30 is chosen such that the plunger 30 does not release the skid sensing device below a minimum running speed of, for example, 10 mph.

After the plunger 30 is released, the relative angular movement between the flywheel 10 and the thrust member 13 due to the rapid deceleration of the wheel and the shaft while the flywheel 140 continues to rotate in its inertia is required by the ball 15. The thrust member 13 and the clutch plate 21 are directed outwardly in the axial direction from the flywheel 10 by being moved away from (16) and (17). This causes the lever 24 to rotate to actuate the combined modulator and discharge valve assembly.

The clutch plate 21 moves on the protruding piece 20. Thereafter, the flywheel 10 and the thrust member 13 are rotated against the combined frictional force between the clutch plate 21 and the clutch surface 22 whose threshold value is determined by the force of the spring.

The threshold value can be easily adjusted by adjusting the axial position of the thrust transmitting member 25 relative to the lever 24 after the cover 7 is removed.

In some forms the peripheral demands 34 may be replaced with axial slots. In another modification, the radial balls 31 and the compression springs 33 are omitted and each pair of radially opposed pairs of weights 30 is mounted on one end of the elastic strip in the form of a suitable plate string, Is extended almost circumferentially and its other end is coupled to the flywheel by a rigid connection or other fixture.

This leaf spring acts to support the weight 30 in the same direction as the weight 30 is carried by the compression spring 33. The configuration or operation of the rest of the modified sensing device in this way is the same as that of FIGS.

In the configuration shown in Figs. 3 and 4, the weight body 40 is rotatably mounted so that one end thereof angularly moves along an arc in a plane perpendicular to the axis of the axis. The weight 40 is able to rotate about a pivot 41 located on the end face of the flywheel 10 adjacent to the request 14, which pivot 41 is pivoted on the shaft 4. Parallel to the axis. The weight 40 is mounted to the lever 42 extending in the circumferential direction from the pivot 41, the radially outermost end of the lever 42, and relatively close to the outer wall 39 of the flywheel 10. It consists of the mass 43. The mass 43 is in the form of an arc and protrudes in the circumferential direction past the outer end of the lever 42 remote from the pivot 41. An inwardly protruding portion 44 is formed at the outer end of the lever 42, and can be coupled to an axially extending slot 45 formed on the outer surface of the thrusting unit 13.

A tension spring 46 is formed between the end of the flywheel 10 and the shallow demand 47 formed between the lever 42 and the end of the mass 43 adjacent to the pivot 41 and is provided with the lever 42 and the mass. It is installed between the fixing parts 48 which were arrange | positioned at regular intervals from the outer end of 43. As shown in FIG. The request 47 is disposed radially outward from the string 49 passing through the pivot 41 and the fixing part 48 so that the spring 46 inserts the projection 44 of the lever 42 into the slot 45. Force the lever 42 in the direction of touching it.

A balance retaining hole 50 is formed in the end wall of the flywheel 10 in which the flywheel 10 is partially removed so as to compensate the weight of the weight 40 to prevent and maintain the weight deflection of the flywheel 42.

By placing most of the weight on the mass portion 43 and placing it close to the outer wall 39 of the flywheel 10, it is further improved at any given speed compared to that obtained in the embodiments of FIGS. 1 and 2. Centrifugal force effect can be obtained. This has the advantage of allowing the protrusions 44 to engage or separate from the slots 45 under more rapid action. This effect can be achieved by relatively shortening the distance X between the line of action passing through the string 49 and the line of action 51 passing through the spring 46.

As shown in FIG. 4, the moment is calculated based on the bibot 41 as follows.

Fr × L = Fs × X

Where Fs is the force of the spring 46 and Fr is the centrifugal force acting at the lever radius "L". Therefore, the centrifugal force Fr can be quickly overcome by the action of the spring force Fs above the size at which the spring 46 is extended by the movement of the relatively small lever 42.

The rest of the configuration or operation of the sensing device shown in FIG. 3 and FIG. 4 is the same as that of FIG. 1 and FIG.

The present invention is such a skid detection device is suitable for other small vehicles such as a motor cycle or a passenger car.

Claims (9)

It consists of a flywheel mechanism 5 which rotates together with an axis 4 driven from the wheel to be braked and comprises a flywheel member 10 and a thrust member 13 and in the relative angular movement between these two members 10, 13. In response, one of these members moves axially with respect to the opposing side, such that the first angular position and the axially movable member actuate the brake pressure modulating means 3 so that these two members are aligned at a predetermined angle. A cam means moved to a second angular position yarn cooperating with the means, wherein a fixing means operating in a centrifugal cavity is provided to fix the two members 10, 13 together at the first angular position relative to the opposite side, The fastening means is automatically releasable in response to a centrifugal force of a magnitude corresponding to a predetermined minimum running speed of the vehicle, which fastening means moves in a plane perpendicular to the axis of the axis 4. It is composed of at least one weight as much as possible, and this weight is usually carried inwardly by the elastic means in a fixed position for fixing the two members together, and the weight is larger than the centrifugal force applied thereto at the minimum running speed. In the rotary flywheel skid detection device for a hydraulic brake system of a vehicle, when the size is reached and moves outward to reach a separation position, the two members can be freely moved relative to the other side. Rotation for a hydraulic braking device of a vehicle, characterized in that it consists of a plunger 30, the inner end of which is elastically coupled to a request 34 formed in the radial ball 31 and formed in a compensating form on the other side member 13. Flywheel skid detection device. The method according to claim 1, characterized in that there are two weights, each weight consisting of a plunger 30 guided in the radial ball 31, wherein the radial balls 31 are mutually opposite in the radial direction. Skid detection device. Skid detection device according to claim 1 or 2, characterized in that the plunger (30) is mounted on the elastic strip. It consists of a flywheel assembly 5 which rotates with an axis 4 driven from a wheel to be braked and comprises a flywheel member 10 and a thrust member 13 and is adapted to the relative angular movement between these two members 10, 13. In response, one of these members moves axially relative to the opposing side, such that the first angular position and the axially movable member, at which these two members are aligned at a predetermined angle, cause the brake pressure modulating means 3 to actuate. Including a cam means moved between the second angular position cooperating with the means, a fixing means actuated by centrifugal force is provided to fix the two members 10, 13 together at the first angular position relative to the opposing side. The means are automatically releasable in response to a centrifugal force of a magnitude corresponding to a predetermined minimum running speed of the vehicle, the fastening means being in a plane perpendicular to the axis of the axis 4. It is composed of at least one weight body which is movable, and this weight body is usually carried inward by the elastic means in a fixed position for fixing the two members together, and this weight body has the centrifugal force applied to the weight body at the minimum traveling speed. In the rotary flywheel skid detection device for a hydraulic brake of a vehicle in which when it reaches a size equal to or more than the size, it moves outward to reach a separation position and the two members can freely move relative to the other side. 40 is rotatably mounted on a pivot 41 disposed on one side member 10 such that the shaft 40 is moved about an axis parallel to the axis 4 of the shaft 4, and the spring 46 moves a portion of the weight body to the other side member. Rotating flywheel skid detection device for a hydraulic brake of a vehicle, characterized in that the weight is mounted to be coupled to the request (45) formed in the. The weight body 40 according to claim 4 is composed of a lever 42 extending in a circumferential direction from the pivot 41 and a mass body 43 mounted on the radially outermost end of the lever. Skid detection device, characterized in that the inward projection 44 is defective in the request (45). The method according to claim 4 or 5, wherein the spring 46 is composed of a tension spring acting between the first fixing portion 48 of the one side member 10 and the second fixing portion of the weight body. And a tensioning spring acting between the second fixing parts, wherein the fixed part of the weight moves outward from the string 49 passing through the pivot 41 and the first fixing part 48. A skid sensing device according to claim 1 or 4, wherein the request (34, 45) extends in the circumferential direction and the weight is coupled to the request to prevent relative axial movement between the two members. A skid sensing device according to claim 1 or 4, wherein the request consists of an axial slot and the weight is coupled to the request to prevent relative angular movement between the two members. Claim 1 or 4, wherein the flywheel member 10 is rotatably arranged on the shaft (4) and the annular demand 14 is formed at one end, the thrust member (13) is movable in the axial direction And a portion of the annular form is inserted into the annular demand (14) of the flywheel member, and the fixing means is mounted on the flywheel member (10) to be fixedly coupled with the thrust member (13).

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